Moist-air flue for drying machines



2 Sheets-Sheet l ON A o oo oo oo\ oo oo oo 0c 00 0 oo oo oo oo oo oo [o oo oo oo oo F. L. FURBUSH Filed Oct 31, 1927 MOIST AIR FLUE FOR DRYING MACHINES May 29, 1928.

May 29, 1928.

F. L. FURBU'SH MOIST AIR FLUE FOR DRYING MACHINES Filed Oct. 31, 1927 j 2 Sheets-Sheet 2 Patented May 29, 1928.

umrsn starts PATENT caries.

FRANK L. runnusn, or wns'rronn, MASSACHUSETTS, nssrenon r0 0. e. SARGENTS SONS CORPORATION, OF GRANITEVILLE, MASSACHUSETTS, Ac

MASSACHUSETTS.

' CORPORATION or MOIST-AIR FLUE ron DRYING MACHINES.=

' Application filed October 31, 1927. Serial No. 229,861.

' This invention relates to that type of drying machine, usually employed for drying wool and other textile materials,*in which the machine is divided up into compartments, each one having fans or blowers for circulating the air in that compartment and a moist air flue, which, heretofore, also had a blower for forcing a part of the moist air out through that flue. I find in practice that these two sets of blowers are operating against each other as the machine has been constructed heretofore and consequently there is a loss of efficiency. In this machine, heretofore, the moist air flue has been on the side opposite the circulating blower or blowers.

For the purpose ofreducing this loss of efficiency I place the moist air flue or box on the same side as the blowers and arrange the moist air box or flue so that the amount of air entering it can be regulated from the outside and also so that the moist air can be led into it from either one of two adja cent compartments and so that the blower heretofore employed for this flue is entirely eliminated and yet the moist air is discharged efficiently.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is a plan of a part of a dryer with the top removed showing the present improvements applied thereto;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1; i

Fig. 3 is a longitudinal sectional view on the line 3-3 of Fig. 1, and

Fig. 4: is a perspective view of the exhaust air flue with some adjacent parts illustrated.

As shown. I have applied this invention to a dryer 10 having an apron 11- extending along through it but having partition walls 12 extending across the apron both above and below, 1f desired, to divide it up into compartments which, except for the openings where the apron passes through, are entirely separate from each other. Each one may be considered as constituting a separate'dryer for different parts of the material.

The stock fed to the apron at the end 13 passes continuously through to the end 1.4.

Where it is dropped. In each compartment are blowers 15 for circulating the air in, the direction indicated by the arrows in Fig. 2 through the steam coils 16 which are usually employed, overon the stock on the apron 11, and then back again;

The exhaust moist air flue has usually been i on the outside-ofthe dryer opposite the coils 16. It is on this side that the fresh air inlets 17 are located at intervals along the wall of the dryer. I now place the exhaust air flue or air box 20 on the side on which the coils are located and in fact between the ends of two adjacent sets of coils and in registration with the partition 12. That is, where there is one of these partitions there is also an air box at its end. This air box itself constitutes a partition to separate air in one compartment from the next one.

the blower each compartment becomes dryer and dryer with the changing condition of the stock.

This air box takes a'portion of the moist air out after passing through the wet stock and is provided with a damper 23 to further regulate the efficiency 'of the air box as an exhaust flue. It is not desired to circulate all the air around the dryer once and then discard it. Much of it is reheated and used over and over again.

It is forced out throughthe blower by the same blower or blowers and circulates the heated air through the wet stock. If it is found that it is necessary to take more moist air out of the wet end of the 'dryer than out of the next compartment, the hinged door 21 connected with the wet end compartment'can be opened wide and the Two doors or gates 21, are each operated til from these compartments. This is all provided for by the regulation described.

Although I have illustrated and described only a single form of the invention I am aware of the fact that modifications can be made therein byany person skilled in the art Without departing from the scope of the invention as expressed in the claims. Therefore, I do not Wishto be limited in these respects, but What I do claim is 1. In a dryer, the combination With an endless apron for conveyingthe material throughout the length of the machine and a series of partitions for dividing the dryer into aplurali-ty of compartments, of blowing means at one side for circulating the air down through the materialon the apron, a

, series of heating coils in each compartment on the-same side as the blowing means itlJIOllfJh which the air is circulated thereby and a moist air box located between each two adjacent sets of coils for receiving the air directly from. the bottom of the dryer below the coils and exhausting it into the open air.

1 2. In a dryer, the combination With a cas ing having an endless apron therein for convcying material longitudinally therethrough doors at the bottom of each moist'airbox and at opposite sides of the same .for admitting-moist air from-either one of the tWoadjacent compartments and means for adjustinn. these doors independently of each other.

In testimony whereof I have hereunto at fixed my signature.

. FRANK nlrtnaeusn. 

